mirror of
https://codeberg.org/privacy1st/nix-git
synced 2024-11-23 22:19:33 +01:00
51 lines
1.2 KiB
Nix
51 lines
1.2 KiB
Nix
{ config, pkgs, ... }:
|
|
{
|
|
# Keep only the 7 most recent system generations.
|
|
#
|
|
# Based on https://github.com/NixOS/nixpkgs/blob/nixos-23.11/nixos/modules/services/misc/nix-gc.nix
|
|
#
|
|
# Alternatively: Delete generations older than 7 days
|
|
# https://nixos.wiki/wiki/Storage_optimization#Automation
|
|
#nix.gc = {
|
|
# automatic = true;
|
|
# dates = "weekly";
|
|
# options = "--delete-older-than 7d";
|
|
#};
|
|
|
|
assertions = [{
|
|
assertion = config.nix.enable;
|
|
message = ''nix-gc-7 requires nix.enable'';
|
|
}];
|
|
|
|
systemd.timers."nix-gc-7" = {
|
|
wantedBy = [ "timers.target" ];
|
|
partOf = [ "nix-gc-7.service" ];
|
|
timerConfig = {
|
|
OnCalendar = "weekly";
|
|
Persistent = true;
|
|
|
|
AccuracySec = "2d";
|
|
RandomizedDelaySec = "1d";
|
|
};
|
|
};
|
|
|
|
systemd.services."nix-gc-7" = {
|
|
description = "Keep only the most recent 7 system generations";
|
|
|
|
conflicts = [ "shutdown.target" "sleep.target" ];
|
|
before = [ "shutdown.target" "sleep.target" ];
|
|
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
PrivateTmp = true;
|
|
|
|
Nice = 19;
|
|
IOSchedulingClass = "idle";
|
|
};
|
|
|
|
script = ''
|
|
${config.nix.package.out}/bin/nix-env --delete-generations +7 --profile /nix/var/nix/profiles/system
|
|
'';
|
|
};
|
|
}
|